CN109513353A - A kind of ductwork type SCR denitration hot wind soot blower system and operating method - Google Patents
A kind of ductwork type SCR denitration hot wind soot blower system and operating method Download PDFInfo
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- CN109513353A CN109513353A CN201910021725.1A CN201910021725A CN109513353A CN 109513353 A CN109513353 A CN 109513353A CN 201910021725 A CN201910021725 A CN 201910021725A CN 109513353 A CN109513353 A CN 109513353A
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- 239000004071 soot Substances 0.000 title claims abstract description 78
- 238000011017 operating method Methods 0.000 title claims description 8
- 238000007664 blowing Methods 0.000 claims abstract description 66
- 239000003054 catalyst Substances 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 230000008676 import Effects 0.000 claims abstract description 4
- 238000010926 purge Methods 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013517 stratification Methods 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to ductwork type SCR denitration hot wind soot blower systems, including compressed air reservoir, heating coil, reactor, catalyst, collection gas bag, solenoid valve, soot blowing pipeline main pipe and pipe network soot blowing layer；Compressed air reservoir exit is equipped with gate valve, and compressed air reservoir is connected to the heating coil at the cone flue of reactor lower end；Several layers catalyst is equipped in reactor, each layer of catalyst is provided with a collection gas bag, collection gas bag import and heating coil outlet, and the outlet of collection gas bag is connected to soot blowing pipeline main pipe, and each collection gas bag exit is equipped with solenoid valve；Soot blowing pipeline main pipe is fixed on reactor wall.The beneficial effects of the present invention are: the present invention is purged using compressed air vertical direction strength, not only with strong points, area coverage is wide, deashing is without technical characterstics such as dead angles, the service life of catalyst can also be improved, extend the replacement cycle of catalyst, to improve denitration efficiency, operating cost is saved.
Description
Technical field
The present invention relates to a kind of soot blowers, and in particular to a kind of ductwork type SCR denitration hot wind soot blower system and
Operating method.
Background technique
Currently, selective catalytic reduction (SCR) denitration technology is denitration efficiency highest, the denitration skill of most market prospects
Art already becomes the country or even various industries efficiently controls NO in the worldxThe primary selection of discharge.Catalyst is de- as SCR
The core material of nitre technology becomes the direct factor for restricting catalysis reaction.However when the cigarette containing high concentration and high viscosity dust
Gas is easy to cohesion in its surface when passing through catalyst, formed and put up a bridge and block, so as to cause catalyst poisoning, greatly dropped
Low denitration efficiency.To prevent catalyst layer dust stratification, denitration efficiency is improved, soot blower need to be set above every layer of catalyst.
However, glass industry is different from coal-burning power plant, glass furnace generallys use fuel more inferior, and contains in raw material
There are a large amount of saltcake and soda ash etc., thus flue gas has alkali (Na+Salt, CaO etc.) that content is high, adhesiveness is strong and corrosivity is high etc. is special
Point.Engineering practice proves traditional soot-blowing mode (such as sonic soot blowing, steam soot blowing etc.) to the soot blowing intensity of such flue gas not
Height, effect is little, and stability is very poor.
Summary of the invention
The purpose of the present invention is overcoming deficiency in the prior art, a kind of ductwork type SCR denitration hot wind is provided and is blown
Ash system and operating method.
This ductwork type SCR denitration hot wind soot blower system, including it is compressed air reservoir, gate valve, heating coil, anti-
Answer device, catalyst, collection gas bag, solenoid valve, soot blowing pipeline main pipe and pipe network soot blowing layer；Compressed air reservoir exit is equipped with lock
Valve, compressed air reservoir are connected to the heating coil at the cone flue of reactor lower end；Several layers catalyst is equipped in reactor,
Each layer of catalyst is provided with a collection gas bag, collection gas bag import and heating coil outlet, the outlet of collection gas bag and blowing pipe
The connection of road main pipe, and each collection gas bag exit is equipped with solenoid valve；Soot blowing pipeline main pipe is fixed on reactor wall, soot blowing
Pipeline main pipe is connected to the interlude of pipe network soot blowing layer, and pipe network soot blowing layer is located at right above catalyst, pipe network soot blowing layer and catalysis
The corresponding arrangement of agent；Pipe network soot blowing layer is made of several pipelines, and soot blowing pipeline is equipped with several fumaroles, and fumarole is taper gas
Hole, the vertical face catalyst surface of fumarole.
As preferred: soot blowing pipeline main pipe and reactor wall pass through flanged joint.
As preferred: each pipeline of pipe network soot blowing layer is fixed on reactor wall supporting steel plate.
As preferred: manual ash blowing mouth is arranged on the downside of every layer of catalyst elements upper surface, that is, automatic ash blowing mouth.
The operating method of this ductwork type SCR denitration hot wind soot blower system, comprising the following steps:
1) draw in compressed air to compressed air reservoir, when the pressure in storage tank reaches setting value, gate valve is opened；
2) heating coil of the compressed air Jing Guo reactor lower end cone flue is preheated；
3) the warm pipe full of compressed air after heating is set in collection gas bag when the pressure that every layer collects in gas bag reaches
Definite value and when being in stable state, starts solenoid valve, compressed air sprays by conical nozzle through soot blowing pipeline, start to purge；
4) in purge in the reactor, first solenoid valve is opened, and is purged and is closed after continuing 10s~15s, next
A solenoid valve is opened, and purging is circuited sequentially.
As preferred: in the step 4), purging the half that total amount is no more than collection gas bag every time.
As preferred: in the step 4), two sides are respectively provided with pressure sensor above and below every layer of catalyst elements, to control
The real-time pressure difference in the upper and lower side of central transmission catalyst elements.
The beneficial effects of the present invention are: the present invention is using dry hot compressed air as soot blowing compared with routine techniques
Medium, it is ensured that catalyst works normally in the state of drying, suitable for having the characteristics that adhesiveness is strong and corrosivity is high glass
Glass furnace flue gas.The present invention is purged using compressed air vertical direction strength, not only with strong points, area coverage is wide, clear
Ash is without technical characterstics such as dead angles, moreover it is possible to which the service life for improving catalyst extends the replacement cycle of catalyst, to improve de-
Nitre efficiency saves operating cost, has significant economic benefit.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is the detailed side view of purging pipe network.
Description of symbols: compressed air reservoir 1, gate valve 2, heating coil 3, reactor 4, catalyst 5, collection gas bag 6, electricity
Magnet valve 7, soot blowing pipeline main pipe 8, pipe network soot blowing layer 9.
Specific embodiment
The present invention is described further below with reference to embodiment.The explanation of following embodiments is merely used to help understand this
Invention.It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, also
Can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection scope of the claims in the present invention
It is interior.
As shown in Figures 1 to 3, the ductwork type SCR denitration hot wind soot blower system, is for glass furnace
The soot blower system of SCR denitration reaction device, including compressed air reservoir 1, gate valve 2, heating coil 3, reactor 4, catalyst 5, collection
Gas bag 6, solenoid valve 7, soot blowing pipeline main pipe 8, pipe network soot blowing layer 9.
Compressed air reservoir 1 provides soot blowing gas source for storing and discharging compressed air, to pipe network soot blowing unit, and guarantees
The pressure of compressed air gas source, flow keep stablizing, but also later period purging pipe network effect stability.In addition, each layer of catalyst
It is equipped with a collection gas bag, and passes through the opening and closing of solenoid valve control collection gas bag, is further ensured that the stability of gas source.
Pipe network soot blowing layer 9 is located at right above catalyst 5, arrangement corresponding with catalyst 5.The fumarole of jet soot blowing pipeline hangs down
Straight 5 surface of face catalyst, soot blowing great efforts, without dead angle, deashing is thorough.As shown in Fig. 2, pipe network soot blowing layer 9 is by multiple
Pipeline composition, each pipeline is fixed on 4 inner wall supporting steel plate of reactor, to install, convenient disassembly.The setting of soot blowing pipeline is multiple
Fumarole, distance, aperture between each fumarole etc. are determined according to the flow velocity and pressure of compressed air, to reach purging effort
It is sufficient and do not damage catalyst.Particularly, height of the pipe network soot blowing layer 9 apart from catalyst 5, soot blowing branch diameter, spacing, jet
The parameters such as hole size, spacing can change according to Practical Project situation is corresponding, to guarantee soot blowing effect.Jet soot blowing pipeline is adopted
With circular pipe, prevent grieshoch from accumulating.Fumarole is taper stomata, and the gas sprayed is enable to be evenly distributed in catalyst table
Face, and area coverage is wide.
By the preparatory heated compressed air of flue gas, hot (flue gas) gas of purge unit cold (compressed air) is avoided to alternately produce
NH4HSO4Reduce catalyst performance.The taper cigarette of SCR reactor lower end is set to for compressed air preheating heating coil 3
At road, flue gas flow rate is fast, can prevent the dust stratification blocking of heating pipeline section.The compression of SCR inside reactor is designed by theoretical calculation
The heat exchange area of air heating coil selects suitable caliber and carries out reasonable Arrangement.
Collect 6 import of gas bag and 3 outlet of heating coil, the outlet of collection gas bag 6 is connected to soot blowing pipeline main pipe 8, collects gas bag 6
Size can the air supply according to needed for soot blower system carry out theoretical calculation and reasonable Arrangement.
Soot blowing pipeline main pipe 8 and 4 inner wall of reactor pass through flanged joint, installation, convenient disassembly.Soot blowing pipeline main pipe 8 with
Jet soot blowing branch pipe interlude connection, so that each fumarole purging effort of branch pipe is sufficient and uniform.
Each solenoid valve 7 is connected to each soot blowing pipeline main pipe 8, and control centre is suitable by solenoid valve open and close control jet
Sequence, and control solenoid valve opening/closing time and reach purging effect, each purge time is calculated according to collection gas bag total amount and smoke components.
In order to guarantee the stability and purging effect of gas source, total amount is purged every time no more than the half of collection gas bag.It is filled in gas source
In the case where foot, can start simultaneously multiple solenoid valves so as to and meanwhile purge muti-piece catalyst.
Preferably, pressure sensor can be respectively provided in two sides above and below every layer of catalyst elements, for passing to control centre
The real-time pressure difference in the defeated upper and lower side of catalyst elements, so that purging duration of the control centre to solenoid valve issues real-time effective instruction.
Preferably, manual ash blowing mouth can also be set every layer of catalyst elements upper surface, manual soot blowing gas source can be from collection
It is extracted in gas bag.Manual ash blowing mouth is set on the downside of automatic ash blowing mouth, will in emergency circumstances to be urged by manual soot blowing strength
Dust stratification on agent unit is blown into reactor bottom.
The Benitration reactor length and width dimensions of certain 1000t/d glass kiln are respectively 7.8m and 5.3m, and three layers of catalysis are arranged altogether
Agent conversion zone.If equipment direct investment cost is about 500,000, external inspection platform using existing traditional RAKE soot blower
Equal investments need 1,000,000, if equipment investment only needs 100,000, and corresponding steel construction and basis are indirectly using soot blower system of the invention
Investment about needs 100,000.In addition, catalyst service life of the invention increases, catalyst price is about 1.5 ten thousand yuan/m3, every layer is urged
Agent volume is 21.87m3, results of measuring display saving about 32.805 ten thousand yuan/year of catalyst cost, at the same time, operation power charge
It substantially reduces, power cost saving about 12.8 ten thousand yuan/10000 years.It follows that economic benefit is obvious.
The specific implementation process of the ductwork type SCR denitration hot wind soot blower system is as follows:
Draw in compressed air to compressed air reservoir 1 from plant area's air compression station, is set when the pressure in air reservoir reaches
Definite value, gate valve 2 are opened.Compressed air is preheated by the cone flue of 4 lower end of reactor, the compressed air warp after heating
Utilidor riddles in collection gas bag 6, when the pressure that three layers collect in gas bag reaches setting value and is in stable state, starting electricity
Magnet valve 7, compressed air are sprayed through soot blowing pipeline by conical nozzle, start to purge.
In the purge in SCR denitration reaction device, first solenoid valve is opened, and is purged and is closed after continuing 10s~15s
It closes, next solenoid valve is opened, and purging is circuited sequentially.
Ductwork type SCR denitration hot wind soot blower system of the present invention can be (anti-according to catalyst surface ash-deposition situation
Answer device front and back pressure difference) change soot-blowing mode and duration.
Claims (7)
1. a kind of ductwork type SCR denitration hot wind soot blower system, which is characterized in that including compressed air reservoir (1), gate valve
(2), heating coil (3), reactor (4), catalyst (5), collection gas bag (6), solenoid valve (7), soot blowing pipeline main pipe (8) and pipe network
Soot blowing layer (9)；Compressed air reservoir (1) exit is equipped with gate valve (2), end toper under compressed air reservoir (1) and reactor (4)
Heating coil (3) connection at flue；Several layers catalyst (5) are equipped in reactor (4), each layer of catalyst (5) is provided with
One collection gas bag (6), collection gas bag (6) import and heating coil (3) outlet, collection gas bag (6) outlet and soot blowing pipeline main pipe
(8) it is connected to, and each collection gas bag (6) exit is equipped with solenoid valve (7)；Soot blowing pipeline main pipe (8) is fixed on reactor (4)
Inner wall, soot blowing pipeline main pipe (8) are connected to the interlude of pipe network soot blowing layer (9), and pipe network soot blowing layer (9) is being located at catalyst (5) just
Top, pipe network soot blowing layer (9) arrangement corresponding with catalyst (5)；Pipe network soot blowing layer (9) is made of several pipelines, soot blowing pipeline
Equipped with several fumaroles, fumarole is taper stomata, vertical face catalyst (5) surface of fumarole.
2. ductwork type SCR denitration hot wind soot blower system according to claim 1, which is characterized in that soot blowing pipeline
Main pipe (8) and reactor (4) inner wall pass through flanged joint.
3. ductwork type SCR denitration hot wind soot blower system according to claim 1, which is characterized in that pipe network soot blowing
Each pipeline of layer (9) is fixed on reactor (4) inner wall supporting steel plate.
4. ductwork type SCR denitration hot wind soot blower system according to claim 1, which is characterized in that urged at every layer
Manual ash blowing mouth is set on the downside of agent unit upper surface, that is, automatic ash blowing mouth.
5. a kind of operating method of ductwork type SCR denitration hot wind soot blower system as described in claim 1, feature exist
In, comprising the following steps:
1) draw in compressed air to compressed air reservoir (1), when the pressure in storage tank reaches setting value, gate valve (2) is opened；
2) heating coil (3) of the compressed air Jing Guo reactor (4) lower end cone flue is preheated；
3) the warm pipe full of compressed air after heating collects the pressure in gas bag (6) when every layer and reaches in collection gas bag (6)
Setting value and when being in stable state, starts solenoid valve (7), compressed air sprays by conical nozzle through soot blowing pipeline, start to blow
It sweeps；
4) in the purge in reactor (4), first solenoid valve is opened, and is purged and is closed after continuing 10s~15s, next
A solenoid valve is opened, and purging is circuited sequentially.
6. the operating method of ductwork type SCR denitration hot wind soot blower system according to claim 5, feature exist
In in the step 4), purging total amount is no more than the half of collection gas bag (6) every time.
7. the operating method of ductwork type SCR denitration hot wind soot blower system according to claim 5, feature exist
In in the step 4), two sides are respectively provided with pressure sensor above and below every layer of catalyst elements, transmit catalyst to control centre
The real-time pressure difference in the upper and lower side of unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910021725.1A CN109513353A (en) | 2019-01-10 | 2019-01-10 | A kind of ductwork type SCR denitration hot wind soot blower system and operating method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910021725.1A CN109513353A (en) | 2019-01-10 | 2019-01-10 | A kind of ductwork type SCR denitration hot wind soot blower system and operating method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110585922A (en) * | 2019-07-25 | 2019-12-20 | 大唐东北电力试验研究院有限公司 | Automatic device that sweeps of thermal power plant SCR deNOx systems ammonia injection grid |
| CN111905566A (en) * | 2020-07-16 | 2020-11-10 | 无锡东方船研高性能船艇工程有限公司 | Soot blowing device and soot blowing method for marine SCR reactor |
| CN112827355A (en) * | 2020-12-30 | 2021-05-25 | 启源（西安）大荣环保科技有限公司 | Corrugated catalyst module capable of blowing soot online |
| CN113713613A (en) * | 2021-08-30 | 2021-11-30 | 河南柴油机重工有限责任公司 | High-efficient soot blowing system of ship engine SCR reactor |
| CN114452816A (en) * | 2022-02-22 | 2022-05-10 | 大唐环境产业集团股份有限公司 | Denitration operation optimization system based on online dust deposition detection and use method thereof |
| CN117815856A (en) * | 2024-01-05 | 2024-04-05 | 凯佛瑞(上海)化工有限公司 | Desulfurization and denitrification filter and application method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110585922A (en) * | 2019-07-25 | 2019-12-20 | 大唐东北电力试验研究院有限公司 | Automatic device that sweeps of thermal power plant SCR deNOx systems ammonia injection grid |
| CN111905566A (en) * | 2020-07-16 | 2020-11-10 | 无锡东方船研高性能船艇工程有限公司 | Soot blowing device and soot blowing method for marine SCR reactor |
| CN111905566B (en) * | 2020-07-16 | 2022-03-22 | 无锡东方船研高性能船艇工程有限公司 | Soot blowing device and soot blowing method for marine SCR reactor |
| CN112827355A (en) * | 2020-12-30 | 2021-05-25 | 启源（西安）大荣环保科技有限公司 | Corrugated catalyst module capable of blowing soot online |
| CN113713613A (en) * | 2021-08-30 | 2021-11-30 | 河南柴油机重工有限责任公司 | High-efficient soot blowing system of ship engine SCR reactor |
| CN114452816A (en) * | 2022-02-22 | 2022-05-10 | 大唐环境产业集团股份有限公司 | Denitration operation optimization system based on online dust deposition detection and use method thereof |
| CN117815856A (en) * | 2024-01-05 | 2024-04-05 | 凯佛瑞(上海)化工有限公司 | Desulfurization and denitrification filter and application method thereof |
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